Digest::perl::md5s has the same interface as the much faster digest::md5, but unlike that, it is not an interface but a perl implementation of md5. because of this it is slow but it works without c-code. you should use digest::md5 instead of this module if it is available. this module is only useful for

- computers where you cannot install digest::md5 (e.g. lack of a c-compiler)
- encrypting only small amounts of data (less than one million bytes),
e.g. hashing passwords
- educational purposes